Tray



Patented June 3, 1924.

` -JAYIVIIES WILBUR PASSMORE, 0F ALBANY, GEORGIA.

i TRAY.

Application led April 25, 1623. Serialr No. 634,608.

To all whom z'z may concern:

Be it known that I, JAMES WILBUR PASS- MoRE, a citizen of the UnitedStates, residing at Albany, in the county of Dougherty and State ofGeorgia, have invented new and useful Improvements in Trays, of whichthe following is a specication.

My invention has reference to a dental tray for use in taking wax orother impressions of teeth, gums and palate for dental purposes, and hasfor its primary object to produce a tray of a construction whereby theimpression o-f both the upper and lower jaws are simultaneouslyobtained.

A. further object is to produce a dental tray comprising upper and lowerimpression plates connected together at their ends but at all otherparts spaced and held away from each other by posts whereby the dentistcan see that the proper bite is obtained and also whereby a small pieceof wax may be arranged between the plates at the front thereof on whichmay be drawn a line for accurately obtaining the lip line.

To the attainment of the foregoing the invention consists in theimprovement as hereinafter described and definitely claimed.

In the drawings Figure l is a front elevation of the improvement.

Figure 2 is a side elevation thereof.

Figure 3 is a top plan view.

Figure 4 is a bottom plan view.

Figure 5 is a sectional view on the line 5 5 of Fig. 4.

Figure 6 is a front elevation illustrating a modification.

Figure 7 is a sectional View on the line 7-7 of Figure 6.

As disclosed by the drawings, the improvement contemplates theemployment of two impression trays, the upper tray being broadlyindicated by the numeral l, and the loweiI tray by the numeral 2. Bothtrays have their outer edges substantially round in plan being, ofcourse, shaped to correspond.

to the contour of the gums of a patient. In this connection it might bewell to state that the trays constituting my improvement are made invarious sizes to suit the different gums of patients. l

The upper tray l has its inner end domed, in the usual manner, as at 3,and its side edges gradually rounded upwardly as at 4. The outer edge ofthe tray is not flanged or rounded.

The outer edge of the lower tray 2 is similar to that of the upper tray,but the side edges of the said lower tray are rounded downwardly as at5, and the inner edge of the said tray is rounded downwardly as at 6.The rounded edges 5 are flared outwardly, which is true with respect tothe sides of the upper tray.

The ends of both trays are rounded and may be connected. The trays arein contacting engagement only at these points, and are held in properangular relation to each other by inner short posts 7 and outer longerposts 8. The posts 8 are disposed at what we may term the straight outeredges of the trays. Both trays have arranged therein the usualimpression material, and when arranged in the mouth of the patient bothof the patients jaws are brought against this material to obtain theproper impression. The trays of my improvement are so associated thatthe proper bite will be obtained. By placing a piece of the impressionwax between the front posts 8, the operator can draw a lip line thereon.

In Figures 6 and 7 I haveillustrated a slight modification. In thisconstruction the trays 9 and 10 are substantially similar to those abovedescribed, except that the body of the trays are not spaced apart butare secured together by rivets. The outer flanges l0 of each tray, atthe center and outer portions thereof are out away in a line with thebody of the trays.

In my construction of bite trays, there are no flanges on the anteriorlabial portion ofv the trays to interfere with the lips and naturalexpression, enablingthe operator to see that he is getting a perfectbite; still, there are flanges around lingual palatal and posteriorbuccal surfaces, which act as a guide for they jaws. Very little wax isused, thus eliminating warping, which is a great advantage to thedentist.

For edentulous mouths, the upper and lower trays are held together andspaced by four posts, preventing patient from closing the jaws too closewhen taking the bite.

The closed trays are used in taking bites where the upper mouth isedentulous, and the natural lower teeth are in the mouth, or vice versa,lower teeth missing and upper in the mouth.

Having thus described my invention what I desire to claim as new is:

l. In a device of the class described, an

upper vdental impression contacting and rigidly connected at their rearends, and said trays` being spaced from each other at all other pointsand permanently and rigidly held in such spaced re-Y lation. Y

2. In a device for the purpose specified, an upper .dental impressiontray and a lower dental impression tray, each of said' dental trayshaving its sides at points equi-distant tray anda lowerdental impressiontray, both of said trays from' its front rounded'respectiv'ely in'opposite directions, said' trays having' their ends contacting, meansspacing the trays from each vother at-all other points, and said trayshaving their outer flanges cut away at the outer edges of the trays in aline With the body of said trays.

In testimony' whereof I aiX my signature.

JAMEsWiLB'UiPassMoiini

